1387966005 has 48 divisors (see below), whose sum is σ = 2436408000. Its totient is φ = 730888704.

The previous prime is 1387965991. The next prime is 1387966031. The reversal of 1387966005 is 5006697831.

It is a happy number.

1387966005 is a `hidden beast` number, since 1 + 38 + 7 + 9 + 6 + 600 + 5 = 666.

It is not a de Polignac number, because 1387966005 - 2¹⁶ = 1387900469 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2537142 + ... + 2537688.

It is an arithmetic number, because the mean of its divisors is an integer number (50758500).

Almost surely, 2^1387966005 is an apocalyptic number.

1387966005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1387966005 is a deficient number, since it is larger than the sum of its proper divisors (1048441995).

1387966005 is a wasteful number, since it uses less digits than its factorization.

1387966005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170 (or 1167 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 1387966005 is about 37255.4157807962. The cubic root of 1387966005 is about 1115.4744051604.

The spelling of 1387966005 in words is "one billion, three hundred eighty-seven million, nine hundred sixty-six thousand, five".